CH 10-11
For the following small particle, select the correct mass-charge characterization from the response list: beta particle. a) 0/0Q b) 0/-1Q c) 1/0Q d) 4/2Q
0/0Q
For a complete neutralization reaction between 0.10M Ca(Oh)2 and 0.10M HNO3 the base and the acid will react in which of the following molar rations? a) 1-to-1 b) 2-to-2 c) 1-to-2
1-to-2
What is the [OH-] in an aqueous solution in which [H3O+] is 1.00X10-5? a) 1.00 X 10-5 b) 1.00 x 10-7 c) 1.00 x 10-9
1.00 x 10-9
For the following small particle, select the correct mass-charge characterization from the response list: neutron.
1/0Q
For the following small particle, select the correct mass-charge characterization from the response list: neutron. a) 0/0Q b) 1/0Q c) 4/2Q d) 0/-1Q
1/0Q
After three half-lives have elapsed, the amount of a radioactive sample which has not decayed is which of the following? a) 1/3 of the original amount b) 1/8 of the original amount c) 1/9 of the original amount
1/8 of the original amount
After 3 half-lives have elapsed, the amount of a radioactive sample that has not decayed is a. 1/16 the original amount b. 1/3 the original amount c. 1/6 the original amount d. 1/8 the original amount
1/8 the original amount
If the half-life of a 4 gram sample of a radionuclide is 11 hours, then the half-life of a 2 gram sample of the same radionuclide would be a. 11 b. 22 c. 44 d. 5.5
11
A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (cpm) compared to 40 cpm for new wood. If carbon-14 has a half-life of 5730 years, what is the age of the wood?
11,500 years
Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 hours. If 50.0 mg of I-123 were prepared at 8:00 AM on Monday, how many mg remain at 10:00 AM on the following day?
12.5 mg
If the half-life of a 2.0 gram sample of a radionuclide is 14 hours, then the half-life of a 1.0 gram sample of the same radionuclide would be a) 7 hours b) 14 hours c) 28 hours
14 hours
The Ca 2+ ion concentration, in Eq/L, in a solution that contains one mole of Ca 2+ ion and two moles of Cl - ion is a. 0.5 Eq/L b. 2 Eq/L c. 1 Eq/L d. 3 Eq/L
2 Eq/L
The bombardment reaction involving 23/11 Na and 2/1 H gives two products, one of which is 1/1H the other product is a) 24/11 Na b) 24/12 Mg c) 25/12 Mg
24/11 Na
Krypton-79 has a half-life of 35 hours. How many half-lives have passed after 105 hours?
3 half-lives
If 1.50 gram of a 2.00-gram sample of a radioactive substance undergoes decay in 60 minutes, the the half-life of the sample is a) 15 minutes b) 30 minutes c) 120 minutes
30 minutes
For the following small particle, select the correct mass-charge characterization from the response list: alpha particle. a) 4/2Q b) 0/0Q c) 0/-1Q d) 1/0Q
4/2Q
After the addition of a small amount of acid, a solution that is buffered at a pH of 8.0 will have approx. pH of? a) 7.0 b) 8.0 c) 9.0
8.0
If 6.00 grams of an 8.00 gram sample of a radioactive substance undergoes decay in 180 minutes, then the half-life of the substance is a. 720 minutes b. 90 minutes c. 45 minutes d. 360 minutes
90 minutes
Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The two members of a Brønsted-Lowry conjugate acid-base pair will always differ from each other by one unit of charge.(2) An equivalent of an ion is the molar amount of that ion needed to supply one mole of positive or negative charge.(3) In an acid-base titration, the indicator changes color when the reaction between it and added acid is complete.
All three statements are true.
An amphiprotic substance is a substance that can fuction as a) a Bronsted-Lowry acid but not as a Bronsted-Lowry base b) a Bronsted-Lowry base but not as a Bronsted-Lowry acid c) Both a Bronsted-Lowry acid and base
Both a Bronsted-Lowry acid and base
The chemical reaction that occurs when a HCN/CN- buffer system responds to the addition of a small amount of acid is a) HCN+H2) > H3O+CN- b) H30 + OH- > 2H2O c) CN- + H30 > H20 + HCN
CN- + H30 > H20 + HCN
Which of the following pairs of substance could function as a buffer in aqueous solution? a) HCl and HF b) H2CO3 and NaHCO3 c)Na2CO3 and NaHCO3
H2CO3 and NaHCO3
For the triprotic acid H3PO4, the reactant in the second proton-transfer step is? a)H3PO3 b) H2PO4 c) H2PO4-
H2PO4-
Select from the response list the compound or ion that best fits the description: conjugate base of H 3PO 4. a. H3PO4 b. H2PO4- c. HPO42- d. PO43-
H2PO4-
Which of the folliwing acids contains the greatest number of acidic hydrogen atoms? a) H2SO4 b) HC3H3O3 c) HC3H5O3
H2SO4
Which if the following is not a polyprotic acid? a)HCN b)H2SO4 c)H2SPO4
HCN
Which of the following is a conjugate acid-base pair? a) H2CO3/Co3^2- b) H3PO4/PO4^3- c) HCN/CN-
HCN/CN-
In which of the following pairs of acids are both members of the pair strong acids? A) H2CO3 and H2SO4 B) HCl and HF C) HCl and HNO3
HCl and HNO3
The chemical formula for the conjugate acid of Cl0- is a) HClO- b) HClO c)Cl-
HClO
Which of the following chemical equations is that for an acid-base neutralization reaction? a) H2SO4+ZN > ZNSO4+H2 b) HNO3+KOH > KNO3 + H2O c) AGNO3+NaCl > AgCl +NaNO3
HNO3+KOH > KNO3 + H2O
A buffer solution could be prepared from a. NaOH and HI b. LiCN and NaCN c. RbI and HI d. KC2H3O2 and HC2H3O2
KC2H3O2 and HC2H3O2
In which of the following pairs of substances are both memebers of the pairs salts? a) NaCL and NaOH b) Hbr and NANr c) KNO3 and KCN
KNO3 and KCN
Select from the response list the compound that best fits the description: a substance that reacts with H 2SO 4 to produce K 2SO 4. a. NaNO3 b. KOH c. H3PO4 d. K3PO4
KOH
For chemical reaction N3- + H20 > HN3 + OH-, the bronsted-lowry base is a) N3- b) H20 c) Hn3
N3-
In which of the folowing pairs of compounds are both members of the pair STRONG electrolytes? a) NaOh and NaCl b) NH3 and HCl c) NaCn and HCN
NaOh and NaCl
Which of the following statements is correct for the Brønsted-Lowry acid-base reaction a. HCO3- is the conjugate base of HCN. b. HCN is the conjugate acid of HCO3-. c. HCO3- and CN- are a conjugate acid-base pair. d. More than one correct response. e. No correct response.
No correct response.
Which of the following ions cannot be resent in a salt? a) Na+ b) SO4^2- c) OH-
OH-
Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) The terms proton and hydrogen ion are used interchangeably in acid-base discussions.(2) Some hydroxide ion is present in all acidic solutions.(3) The two active species in a buffer are a strong acid and its conjugate base.
Two of the three statements are true.
Which if the following is an inappropriate designation for salt? A) insoluble salt b) completely dissociated salt c) weak salt
Weak Salt
Characterize the following solution using the response list: aqueous NaOH solution. a. an acidic solution b. a buffer solution c. a basic solution d. a neutral solution
a basic solution
Characterize the following solution using the response list: aqueous NaCl solution a. a basic solution b. a buffer solution c. an acidic solution d. a neutral solution
a neutral solution
Which of the following is always a product of an acid-base neutralization reaction? a) an acid b) a base c) a salt
a salt
Which of the following combinations of substances would produce a buffer? a) a strong acid and a salt of the strong acid b) a weak acid and a salt of the weak acid c) a salt of a strong acid and a salt of a weak acid
a weak acid and a salt of the weak acid
Which of the following statements concerning electrolytes is correct? a) all strong acids are strong electrolytes b) all salts are weak electrolytes c) some, but not all, molecular substances are strong electrolytes
all strong acids are strong electrolytes
For the following radiation characterization, choose the correct type of radiation from the response list: most massive type of naturally occurring radioactive emission. a. alpha particle b. beta particle c. gamma radiation d. both alpha and beta particles
alpha particle
When 222Ra undergoes radioactive decay, it forms a new element, 218Rn, and emits a/an ________ a) positron b) gamma rays c) beta particle d) alpha particle
alpha particle
Which if the following types of radioactive emissions has a subatomic particle composition of two protons and two neutrons? a) alpha particle b) beta particle c) gamma radiation
alpha particle
dentify the missing reactant or product in the following nuclear equation using the response list. 238/92U > 234/90Th+________ a. proton b. alpha particle c. neutron d. beta particle
alpha particle
When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced?
aluminum-28
Characterize the following solution using the response list: aqueous HCl solution. a. a buffer solution b. an acidic solution c. a basic solution d. a neutral solution
an acidic solution
Determining the concentration of an acid using an acid-base titration always involves completely reacting a measured volume of the acid with a known volume of a. indicator of known concentration b. 1.0 M base c. 1.0 M indicator d. base of known concentration
base of known concentration
Determining the concentration of an acid using an acid-base titration involves completely reacting a measured volume of the acid with a measured volume of a) base of unknown b) base of known concentration c) indicator of known concentration
base of known concentration
Identify the missing reactant or product in the following nuclear equation using the response list. 27/12Mg > _______+27/13Al a. beta particle b. neutron c. alpha particle d. proton
beta particle
What is the radioactive particle released in the following nuclear equation? 90/38Sr > 90/39Y + ______
beta particle
When a neutron becomes a proton, a ________ is emitted from the nucleus. a) alpha particle b) beta particle c) gamma rays d) positrons
beta particle
Which of the following types of radioactive emissions has a charge and mass identical to that of an electron? a) alpha particle b) beta particle c) gamma radiation
beta particle
at 24C, the molar concentrations of H3O+ and Oh+ ions in pure water are? a) both zero b) both 1.00 X 10-7 M c) both 100 X 10 - 14 M
both 1.00 X 10-7 M
The term nuclide is a term used to describe a) stable, but not unstable, atoms b) unstable, but not stable, atoms c) both stable and unstable atoms
both stable and unstable atoms
Determining the concentration of an acid using an acid-base titration involves which of the following? a) reacting a strong acid with a weak base b) reacting a 1.0 M acid solution with a 1.0 M base solution c) carrying out an acid-base neutralization reaction
carrying out an acid-base neutralization reaction
the half-life of cobalt-60 is 5.2 years. This means that after 5.2 years a cobalt-60 sample a) has been changed into cobalt-30 b) contains half as many cobalt-60 atoms as it did originally c) contains twice as many cobalt-60 atoms as it did originally
contains half as many cobalt-60 atoms as it did originally
For the following nuclear reaction, select the correct reaction type from the response list. 234/90 Th > 230/88 Ra+4/2a a. fission b. bombardment c. decay d. fusion
decay
A Bronsted-Lowry acid is a substance that can a) donate a proton to some other substance b) donate a pair of electrons to some other substance c) accept a proton from some other substance
donate a proton to some other substance
If 25.0 mL of 1.0 M NaOH is needed to completely react with 25.0 mL of a monoprictic acid in and acid-base titration, the morality of the acid is a) equal to 1.0M b) greater than 1.0M c) less than 1.0 M
equal to 1.0M
For the following radiation characterization, choose the correct type of radiation from the response list: readily penetrates all layers of skin. a. gamma radiation b. beta particle c. alpha particle d. both alpha and beta particles
gamma radiation
In an aqueous solution of a weak acid, HA, the concentration of A- ion a) is greater than that of HA b) is equal to that of H+ c) is less than that of H-
is equal to that of H+
The term radioactive nuclide designates an atom whose nucleus a) is unstable b) absorbs radiation c) contain 75 or more neutrons
is unstable
Element 118, the highest atomic numbered laboratory produced elements, has a half-life measured in a) hours b) minutes c) milliseconds
milliseconds
After three half-lives have elapsed, the amount of an 8.0 g sample of a radionuclide that a. remains undecayed is 1.0 g b. has decayed is 7.0 g c. remains undecayed is one-third the original amount d. more than one correct response e. no correct response
more than one correct response
Which of the following is not a general property of radionuclides and used is diagnostic medical procedures? a) must be detectable by instrumentation placed outside the body b) must have a known mechanism for elimination from the body c) must have a long life
must have a long life
Identify the missing reactant or product in the following nuclear equation using the response list. 3/1H+2/1H > 4/2He+_______ a. alpha particle b. neutron c. beta particle d. proton
neutron
A buffer is a substance or combination of substances whose presence in an aqueous solution will a. maintain a constant salt concentration b. convert all weak acids to strong acids c. keep the solution neutral d. more than one correct response e. no correct responsE
no correct responsE
After four half-lives have elapsed, the amount of a radioactive sample that has decayed is which of the following? a) 1/4 the original amount b) 3/4 the original amount c) 1/16 the original amount d) no correct response
no correct response
Which of the following statements about laboratory produced (synthetic) radionuclides is not correct? a) synthetic radionuclides outnumber naturally occurring nuclides by a 7-to-1 ratio b) synthetic radiouclides are now known for each of the naturally occurring elements c) almost all radionuclides used in nuclear medicine are synthetic radionuclides d) no correct response
no correct response
Which of the following types of radioactive emissions has a mass of 2 amu? a) alpha particle b) beta particle c) gamma radiation d) no correct response
no correct response
An unstable nucleus spontaneously emits a particle with zero mass and a positive charge called a ___________. a) positron b) beta particle c) gamma ray d) alpha particle
positron
According to the Brønsted-Lowry theory, a base is a(n) a. proton donor b. proton acceptor c. electron acceptor d. electron donor
proton acceptor
During a bombardment reaction the particles colliding with target nuclei are a) small and traveling very fast b) small ad traveling slow c) large and traveling very fast
small and traveling very fast
The "most used" radionuclide in diagnostic medicine is a) technetium-99m b) sodium-24 c) iodine-123
technetium-99m
In the notation carbon-14, the number 14 is a) the atomic number of the carbon atom b) the mass number of the carbon atom c) the number of neutrons in the nucleus of the carbon atom
the mass number of the carbon atom
The half-life of a radioisotope is _________
the time it takes for one-half of the sample to decay.
The implantation of a radinuclide in living tissue is a common procedure in a) therapeutic, but not diagnostic, medicine b) diagnostic, but not therapeutic, medicine c) both diagnostic and therapeutic medicine
therapeutic, but not diagnostic, medicine
In terms of subatomic particles, the composition of an alpha particle is a. one neutron and two protons b. one neutron and three protons c. two neutrons and two protons d. three neutrons and a proton
two neutrons and two protons
